JazzG It should show players and agents why they need to get this shit in writing, club and players alike don't honour verbal agreements.
They don't honour it in writing either unfortunately as shown by the Suarez case. But more importantly, what are you going to do if their word is all they offer you? The club doesn't have to put anything in writing that they don't want. The issue here is not the burden of proof; both parties already know exactly what was being said. It's that one party doesn't honor the agreement, in whatever form it was made.
I don't approve of players refusing to play, but I think Sporting are the ones at fault here. First they promise not to sell their manager if he stays, and then they go back on that word and ship him in november to United. Then they promise him a set amount he can leave for - and this was clearly used during negotiations with clubs like United, Arsenal and Atletico Madrid during the season - and then the president goes back on that word too.
What happened here is that he had the best season in the last 50 years of Portuguese football and the president wanted to squeeze more millions out of the deal, and then got angry when Gyökeres undermined him by refusing any other clubs than Arsenal. I hope we sign him and then stay away from Sporting from now on, you can't make business with people like this twice.